Brake



Jan. 14, 1930.

BRAKE D. B. WAITE Filed Jan. 16, 1928 IIII 2 Sheets-Sheet 1 IN V EN TOR.

BY A

, ATTORN Jan. 14, 1930, D, wAlTE 1,743,411

BRAKE I Filed Jan. 16, 1928 2 Sheets-Sheet 2- IN V EN TOR.

A TTOgEY Patented Jan. 14,1930

UNITED STATES PATENT OFFICE DONALD 13. WAITE, or soon: BEND, INDIANA,ASSIGNOR TO THE STUDEBAKER'GQR- PORATION, or SOUTH BEND, INDIANA, Aconronnrron on NEW JERSEY BRAKE Application filed January 16, 1928.Serial No. 247,213.

This invention relates to brake shoes and particularly to shoes of theinternal-expanding type, the principal object being to form a brake shoefrom a single piece of metal to pro- '5" vide the same with an arcuatelining supporting plate and a pair of spaced radial reinforc ing webs.

Another object is to provide a brake shoe comprising an arcuate plateand a pair of spaced radial reinforcing webs positioned inwardly fromthe marginal edges of the plate and integrally connected with themarginal edges, the spaced webs forming the sole reinforcing means forthe arcuate plate.

A further object is to provide a brake shoe comprising an arcuate plateand a pair of spaced reinforcing webs forming the sole radialreinforcing means for the plate, positioned inwardly from the side edgesof the plate and integral therewith, the plate being of single thicknessof metal between the webs and of double thickness of metal outwardly ofthe webs.

These being among the objects of the present invention, the sameconsists of certain features of construction and combinations of partsto be hereinafter described with reference to the accompanying drawings,and then claimed, having the above and other objects in view. I

In the accompanying drawings which illustrate a suitable embodiment ofthe present invention, I

Figure 1 is a section through a vehicle brake taken just inside the headthereof showing the brake shoes in elevation.

Figure 2 is a plan View of one of the brake shoes looking toward theconcave surface thereof.

Figure 3 is an enlarged fragmentary'perspective view of one of the brakeshoes showing the same in section.

Figure 4 is an enlarged fragmentary per spective view of the cam contactend ofthe brake shoe.

Figure 5 is an enlarged perspective view of the stamping to which thecam contact plate is secured.

Figure 6 is a fragmentar perspective view showing the anchored end ofone of thebrake shoes.

F1gure 7 is an enlarged section taken onthe line 77 of Figure 1 showingthe brake shoes anchored to a common anchor pin.

Figure 8 is an enlarged section taken on the line 8-8 of Figure 1'showing the brake operating cam. i 7

Referring to the accompanying drawings in which like numerals refer tolike parts throughout the several views, the vehicle brake chosen a forillustration comprises a brake drum 20 mounted upon a vehicle wheel" orpropeller shaft A, and a dust cover or backing plate 21 adjacent to theopen end of the drum 20. The backing plate 21 is rigidly secured to somestationary part of the vehicle (not'shown) and forms a support for the.various parts of the brake mechanism. A bracket 22 is secured by rivets23 or other suitable means to the backing plate 21 to receive andsupport the brake shoe anchor pin 24. The brake shoes which will bedescribed in detail later in the specification are .pivotally The otherend of the shaft 26 projects past the bracket 25 and has a lever 80secured thereto which is connected by some suitable means to a brakepedal or hand lever (not shown).

' Thebrake shoes are formed from asingle piece of sheet metal to providea construction which is very rigid, light in weight, and economical tomanufacture. Each shoe is blanked from a single flat piece of sheetmetal to a partly formed shape. The partly formed shoe is then rolled orformed in any other suitable manner to the shape shown in Figure 3,providing the same with a pair of spaced radial channel-shaped webs 32facing back to back, and an arcuate portion 31 integrally joined at itsside marginal edges with the marginal edges of the upper outwardly-'if-desired by riveting, bolting, welding or otherwise securing anarcuate band 34 to the V convex surface of the arcuate portion 31.

The brake shoe friction facing .35 may be se cured'by rivets 36 to thereinforcing band'34,

157 but it is to be understood however, that the frictijonfacing 35 maybe secured if desired,

directly to the arcuate portion 31 without the use of the reinforcingband 34. I 1

. The free end of cam contact end of the brake shoe has a U-shapedstamping, '50

7 (shown in Figure 5) secured thereto by rivets 37 or other suitablemeans to the outer faces of the webs 32. A hardened steel cam contactplate 3.8 is shown as being securedby rivets 39 to the radial outer faceof the stamping 30, however it may bewelded or removably bolted to theU-shaped stamping 56 if desired. j'

The anchored end of each brake shoe as 3 shown in Figure 6, ispreferably formed by extendin the bases of the channel-shaped webs 32fieyond the flanges thereof to form apair of spaced tongues 40, eachtongue being formed with an opening 41 in axial alignment with anopeningin the other tongue. The metal surroundin each opening/l1 ispreferably bent inwar ly to provide an integral bushing 42. As shown inFigures 6 V and 7, the pro ecting tongues of one of the 4o .br'ake shoesare offset from the webs 32 toward each other and a strip of metal 43forming a part of the arcuate portion 31 is extended and bent downwardlyto abut against 7 the bushings 42 and against the sides of the 45,.tongues 40in order to hold the same in spacedrelationship therebypreventing relative inward movement of thetongue 40. The tongues 40 ofthe two shoes are telescoped with each other and positioned on thecommon anchor pin'24 with washers 44 positioned between the edges of thebushings 42 of the outer tonguesand the outer faces of the inner tonguesto allow unobstructed relative pivotal movement. of the brake shoes. Awasher 45 and a cotter pin 46 extending through the end of the pivot pin24 hold the brake shoes against movement longitudinally of the pivot pin24. V

A coil spring 47 having its ends hooked through lips 48 struck inwardlyfrom the arcuate portions 31 normallyholds the brake shoesoutofengagement with the brake drum 20 and draws the free ends of thesame toflfi-"ward each other so that the cam contact members 38 engageopposite sides of the brake shoe operating cam 27.

From the foregoing description, it is a readily apparent that abrakeshoe is provided which is very rigid in construction,

light in weight andveconomical to manufacradial reinforcing meanstherefor, which webs are integral therewith, thereby tending to giveadded strength and rigidity to the brake shoe structure.

' Formal changes may be made in the specific embodiment of the inventiondescribed without departing from the spirit and substance of the broadinvention, thescope of which is commensurate with the Wl1atIclaim is:

1. A brake shoe comprising an arcuate plate and a pair of spaced radialwebs forming the sole radial reinforcing means thereappended claims.

for positioned inwardly from the side edges of said plate and integraltherewith, said" plate bein of single thickness of metalbetween saidwebs and of double thickness-ofmetal outwardly ofv said webs. e 2.; Aone-piece brake shoev comprising two spaced arc-shaped portions ofchannelshaped section forming the sole radial reinforcing means for saldshoe, and an arcuate plate conforming and integral with thefree outerfaces of the upper flanges of said semi circular portions.

3. A one-piece brake shoe comprisingtwo spaced outwardly-facingarc-shaped channel members forming the sole radial reinforcing means forsaid shoe, and an arcuate plate abutting against thefree faces of theupper flanges of said channel members and having its marginal edgesintegrally.connected with the marginal edges of said flanges.

4. A brake shoe comprising two spaced semi-circular channel-shapedportions forming the sole radial reinforcing means for said .shoe, asemi-circular plate formed integral with the upper flanges. of saidchannel members abutting against the free faces thereof,

a semi-circular reinforcing band secured to sa1d plateyand brakefrictionfacmg secured to sald band. i

5. A brake shoe comprising an arcuate plate, a pair of spaced radialwebs forming the sole radial reinforcing means therefor positionedinwardly from the marginal edges of sald plate and integrally connectedwith said edges, spaced tongues at one end of plate, a pair of spacedradial channel members forming the sole radial reinforcing meanstherefor positioned inwardly from the marginal edges of said plate andintegrally connected with said edges, spaced tongues at one end of saidshoe integral with said channel members extending beyond said arcuateplate having openings therein flanged inwardly to provide bushingsintegral with said tongues, and a metal strip integral with said arcuateplate abutting against said bushings and the inner sides of said tonguesto hold said tongues in spaced relationship.

7. A one-piece brake shoe comprising an arcuate plate, a pair of spacedradial webs forming the sole radial reinforcing means thereforpositioned inwardly from the marginal edges of said plate and integrallyconnected with said edges, a U-shaped stamping secured to the sides ofsaid radial webs to abut against adjacent ends thereof, and a camcontact member secured to said U-shaped stamping.

8. A brake shoe comprising an arcuate plate terminating at each sideedge in a reversely bent portion and having a pair of spaced radial websintegrally connected with said reversely bent portions to form the soleradial reinforcing means for said shoe.

9. A brake shoe comprising an arcuate plate, a pair of spaced radialwebs forming the sole radial reinforcing means therefor positionedinwardly from the marginal edges of said plate and integrally connectedwith said edges, a member extending between said webs and havingportions secured thereto, and a cam contact member secured to said firstmember.

10. A brake shoe comprising an arcuate plate, a spacing member extendingbeyond an end of said plate, a pair of spaced radial webs forming thesole radial reinforcing means for said plate positioned inwardly fromthe marginal edges thereof and integrally connected with said edge, andspaced tongues at one end of said shoe integral with said webs extendingbeyond said arcuate plate into contacting relationship with said spacingmember, the metal surrounding said opening being flanged to providebushings integral with said tongues.

11. A one-piece brake shoe comprising an arcuate plate, a pair of spacedradials webs forming the sole radial reinforcing means thereforintegrally connected with the mar ginal edges of said plate, and spacedtongues at one end of said shoe integral with said webs extending beyondsaid arcuate plate and having aligned openings therein, the metalsurrounding said openings being flanged to provide bushings integralwith said tongues.

12. A one piece brake shoe comprising an arcuate plate and a pair ofspaced webs forming radial reinforcing means therefor, having incombination therewith, a U-shaped member comprising a support for a camcontact member secured to said radial webs inwardly of the marginaledges of said plate.

